<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Title</title>
</head>
<body>
<script>
	(function(){
		alert('运行吧')
	})()
	function Fn(){
		console.log('123');
	}
	Fn()

	function fn(){
		console.log('第三次提交')
	}
	fn()
</script>
</body>
</html>